Allen-Bradley 1756-OB16D ControlLogix Digital DC Output module provides following diagnostic features: Short Trip, No Load Detection, Output Verification, Pulse Test, Time Stamp of Diagnostics. Each 1756-OB16D module maintains specific identification information that separates it from all other modules. The 1756-OB16D module mounts in a ControlLogixchassis and uses a Removable Terminal Block (RTB): 1756-TBCH or 1756-TBS6H, or an Interface Module (IFM) to connect all field-side wiring.